Dust mop frame



FIG. 1 is a top plan view of the dust mop frame showing our new design;

FIG. 2 is a side elevation view of one side thereof, the other side being identical thereto;

FIG. 3 is an end elevation view from the left end thereof, the right end being identical thereto; and

FIG. 4 is a bottom plan view thereof. 

The ornamental design for a dust mop frame, substantially as shown and described. 